Unfortunately there is no uniform or predictable process. With that said, if your application has no problems or mistakes and is processed by the timeline, the "most" common scenario is to send the application, not hear anything for 2-3 months, and then get an email from CIC stating that your application has been received (called the AOR). Usually within 24 hours of this email, your information is viewable for the first time on ECAS and it will typically say "Decision Made" and when you click on that it will say that your application is in process. Anywhere from 2-6 weeks after this, a fourth line will show up in ECAS stating that your PR card has been mailed and your status usually changes from "Decision Made" to "Complete". Depending on the officer who processed your application, you may or may not get a subsequent email and/or it may just randomly appear in ECAS.
All of these things are unpredictable and depend heavily on who is processing your specific application. Do not base your concern solely on what other people's experiences on here are. Additionally, there have been rolling technical problems with the production line that makes the PR cards and that has slowed things down too. If you are still within 100 days of applying, just wait it out.
